Feature:1. Supports expansion to 10 defense zones and 10 wireless detectors per defense zones.2. Support 8 remote controllers, ASK 433.92MHz wireless standard, 80m wireless distance.3. Subdevices have low battery reminders, status tracking, and offline reminders.4. WiFi layout, no wiring required. Support intelligent scene recognition and reminder of unclosed door.5. Timing arm and disarm, smart home linkage, alarm push, 100m/328.1ft RF distance.6. Support intelligent voice control: for amazon alexa, for google assistant, bring you a lot of convenience.Specification:Item Type: Security Alarm SystemMaterial: ABSHost:Power Supply Mode: AC100-240VBackup Battery: Lithium battery 3.7V, 250mAh (built-in)Wireless Standard: IEEE 802.11 b/g/nWireless Distance: Approx. 70m/229.7ftWorking Environment: -10-+50Door Sensor:Power Supply Mode: DC 3V, CR2450 lithium battery 80mAh (built-in)Wireless Standard: ASK 433.92MHzWireless Distance: Approx. 80m/262.5ftWorking Environment: -20-+55Infrared Alarm:Power Supply: DC3V, 2 x AAA batteries (built-in)Wireless Standard: ASK 433.92MHzWireless Distance: Approx. 80m/262.5ftWorking Environment: -10-+55Doorbell Button:Power Supply: DC3V, CR2450 lithium battery 80mAh (built-in)Wireless Standard: 433MHzWireless Distance: Approx. 80m/262.5ftWorking Environment: -10-+50Remote Control:Power Supply: DC3V, CR2032 lithium battery 80mAh (built-in)Wireless Standard: ASK 433.92MHzWireless Distance: Approx. 80m/262.5ftWorking Environment: -20-+55How to Use:1. Download the for Tuya APP2. The host and mobile phone connect to the same WIFI or hotspot3. The alarm information is sent to the mobile phone in real time4. All alarms are connected to the same WIFI and transmit signals to the host5. The host sends an alarm signal to the mobile phone in real time6. The status of the alarm can be monitored in real time on the mobile phone.Package List:1 x Alarm Host1 x Infrared Alarm 2 x Door Magnetic Set1 x Doorbell Button1 x Remote Control2 x Screw Pack1 x Installation Base1 x Manual